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qu'ently moving outward the outer rollers, M, and by means of the bead m in the-latter setting the tube tightly out into the channel 0, forming a tight and reliable junction of the parts B and G.

Modifications may be made in the forms and proportions, while retaining some of the novel principles and realizing some of-the ad'- vantages oft-he invention.

Figs. 8, 9, l0, and 11 show modifications in which the tube itself which is being set contributes to support the mechanism. All are V ing set by means of a ring, which is set on the tube I in the required position by a pinchingscrew. The tube Dis compelled to turn with the rotary motion imparted by the ratchetlever E through the medium of a feather, which is fitted in longitudinal grooves, formed one i in the exterior of the tube D and the other in the interior of the inclosing-tube.

Fig. 9 shows a hollow-screw, G, with a handwheel, G, as a means of inducing and 0on trolling the endwise movement of the mandrel, a solid rod, D serving as an extension of the mandrel-rod D, extending through such screw and being operated by a ratchet-lever, E, the thrust being taken on balls to reduce the friction. The connection between the solid rod D and the tube D is rigid, and is made by a thimble, D into one end of which the tube D is tightly screwed, while the rod D is tightly screwed into the other end. The

hollow screw G, being adjusted endwise by turning theattached hand-wheel G,movesthe loosely-inclosed rod with it, and correspondingly moves the time D and mandrel D endwise.

Fig. 10 shows a screw-thread formed on the exterior of the tube D. On this is mounted a hand-wheel, G, which is connected with the turning mechanism operated by the ratchetlever. This is efl'ected by a longitudinal key or feather loosely fitted in splines formed in the screw-t1] readed exterior ofthe tube. Dand in the smooth interior of the ratchet-sleeve D".

Theintermittent turning of D compels a cor responding turning of D through the medium of the feather. The turning of the hand-wheel G compels theend movement of D through the medium of the screw-threads.

Fig. 11 shows the ratchet-lever operating on the end of the tubular extension D and the end motion .controlled by a threaded hand- Wheel, G

Figs.'l2, '13, and 1 4 illustrate the apparatus .which I propose to use for determining the shown in Figs. 8, 9, 10, and 11 are employed.

Fig. 12 shows the measuring gage applied to a length of pipe, with one of the connecting-rings attached. a

Fig. 13 isa cross-section through the measuring device alone. 7

Fig. 14 shows the measuring device applied to my expander and the connected mechanism to determine the position of the adjustable flange.

Fig. 15 shows a series of pipe-jo'nts with one ordinary flange and with one joint capable of expansion and contraction.

I propose to make the tube-joint which is here described the subject of a separate application for patent. I believe I can make the joints successfully with awrought-iron ring and no reenforces, in place of the cast-iron ring Gwith the reenforces C which are rep.- resented.

A rotary motion from steam-power or other source may be employed in either form of the apparatus in place of the ratchet.

I claim as my invention 1. In a tube or pipe expander, in combination with the head or housing for the expansion-rollers, a hollow holding-shank attached to the head by a connection adapted to allow rotation of the latter with" reference to the shank, substantially as and for the purpose specified.

2. In a tube or pipe expander, in combination wit-h tube 1, the head or housing for the expansion-rollers, swiveled to the end. of the tube, substantially as and for the purpose shown.

3. In a tube or pipe expander, in combination with the head for the expanding-rollers, having a tubular extension provided with a circumferential groove, the tube I, the ring or IIO extension-piece on the tube, and the ring within and attached to such piece engaging the groove in the tubular extension of the head, substantially as and for the purpose set forth.

4. In a tube or pipe expander, in combina tion with the tube forming the holding-shank, the ring or extension-piece on the tube, the head 'or housing" for the expansion-rollers, provided with a hub or tubular extension in which is a circumferential groove, a divided ring fitting in such groove, and means for attaching such ring to the extension-piece on the tube, substantially as and for the purpose described.

5. In a tube or pipe expander, in combination with the head or housing for the expanding-rollers, and the tube connected with the head so as to allow of its rotation, the mandrel having a shank or extension extending through the tube, and means forturning and moving endwise the mandrel, all substantially as and for the purpose specified.

(No Model.)

A. S. EWING 8v J H. HEITMANN.

, GRAVITY LATCH.

No. 355,645. Patented Jan. 4, 1887'.

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